K9IVB Version Of Sam Wetterlin Calibration Source
This is a brief response to a Yahoo Group Softrock 40 Post referring to one of Sam’s
original designs.
I have Modified the PCB to fit my needs and posted a link on OSH Park website for
sharing the Gerbers or ordering boards.
I have been quite busy and will not get time to assemble my boards until mid
September.
After finishing my build I will update this document.
What Follows is the revised Schematic and BOM.
The OSH Park link is:
https://oshpark.com/shared_projects/u258Y6mg
Dick K9IVB
Cal Source BOM
REF Des
Value
Description
1 MHz
Square
J2
1-10 MHz J1
C1, 2, 5,
7, 9, 11,
13, Ce
0.1u
C3, 4, 6,
10, 12
4.7u
C8
2.2uf
Ca, Cb
270p
Cc, Cd
0.1u
D1
MBRX0540
D1
La
OSC
P1
R1, 4, 6,
Rc
1.2u
Epson SG615P
0.1uF 50volts X7R +/10%
Multilayer Ceramic
Capacitors MLCC SMD/SMT 4.7UF 50V
10% 0805
Multilayer Ceramic
Capacitors MLCC SMD/SMT 0805
2.2uF 50volts X7R
10%
Multilayer Ceramic
Capacitors MLCC SMD/SMT 0805
270pF 50volts C0G
1%
Multilayer Ceramic
Capacitors MLCC SMD/SMT 0805
0.1uF 50volts X7R
5%
Schottky Diodes &
Rectifiers 40 V 0.5A
Schottky Diodes &
Rectifiers 40V 0.5A
Fixed Inductors 1200
nH 2%
Standard Clock
Oscillators 2MHz
5Volt 100ppm -20C to
R2, 3
Thick Film Resistors
4.7 1/8W 4.7ohm 1%
Thick Film Resistors
100 1/8W 100ohm 1%
R5, 7
Res 0.1% - SMD 0805
1/8W 470 ohms
470* 0.1%
Mfg
Mfg #
TDK
CGJ4J2X7R1H104K
TDK
Pkg
Qty
810-CGJ4J2X7R1H104K
8
C2012X6S1H475K125AC 0805
810-C2012X6S1H475KAC
5
TDK
C2012X7R1H225K125AC 0805
810-C2012X7R1H225K
1
Vishay
VJ0805A271FXACW1BC 0805
77-VJ0805A271FXACBC
2
AVX
08055C104JAT2A
0805
581-08055C104J
2
SOD-323
OBS
0
Vishay
0805
Mouser
NXP
PMEG4005EJ,115
KOA
KQ1008TTE1R2G
Epson
SG-615P2.0000MC3:ROHS
732-SG615P2.0MC3RS
Yageo
AC0805FR-074R7L
603-AC0805FR-074R7L
4
Yageo
AC0805FR-07100RL
603-AC0805FR-07100RL
2
667-ERA-6AEB471V
2
Panasonic ERA-6AEB471V
SOD-323
771-PMEG4005EJ-T/R
1206_1008
Combo
660-KQ1008TTE1R2G
0805
1
1
Thick Film Resistors
0805 680ohms 1%
680 Tol
R9, 11
Panasonic ERJ-6ENF6800V
0805
667-ERJ-6ENF6800V
2
Panasonic ERA-6AEB2611V
0805
667-ERA-6AEB2611V
1
Panasonic ERA-6AEB681V
0805
667-ERA-6AEB681V
1
Panasonic ERA-6AEB620V
0805
667-ERA-6AEB620V
1
0805
652-CRT0805CY1R00ELF
1
Panasonic ERJ-6ENF49R9V
0805
667-ERJ-6ENF49R9V
1
Yageo
AC0805FR-07100KL
74LVC1G80
0805
603-AC0805FR-07100KL
SOT23-5 Thin Leads
TI
74LVC1G80DBVRG4
NXP
LVC1G80GW125
R10
2.61K 0.1%
R11
680 0.1%
R8A
62* 0.1%
Res 0.1% - SMD 0805
1/8W 2.61K ohms
25ppm
Res 0.1% - SMD 0805
1/8W 680 ohms
Res 0.1% - SMD 0805
1/8W 62 ohms
R8B
1* 0.1%
Thin Film Resistors SMD CHIP RESISTOR Precision 1 ohm .0.25%
25ppm
Bourns
Ra
49.9 0805 49.9ohms 1% Tol
Thick Film Resistors
1/8W 100K ohm 1%
100K
74LVC1G80
Flip Flops SNGL Pos
Edge Trigrd DType
FlipFlop
Flip Flops 3.3V D FF
+EDGE TRIG
CRT0805CY1R00ELF
Thick Film Resistors
Rb
U1
U2, 3
7SZ04
78M05
U5
2.5V Ref
U6 [Ua]
7WZU04
595-74LVC1G80DBVRG4
1
771-LVC1G80GW125
SOT23-5 Thin Leads
Inverters UHS
Inverter
Inverters 1.65-5.5V
CMOS Single
U4
SOT-23-5 /
DVB
SOT-353 /
TSSOP-5
1
Linear Voltage
Regulators 5.0V
500mA Fxd Pos
Voltage References
2.5V 0.1% precision
Inverters 1.65-5.5V
CMOS Dual
Unbuffered
Inverters UHS Dual
Unbuff Inv
Fairchild
NC7SZ04M5X
SOT-23-5
512-NC7SZ04M5X
ON Semi NL17SZ04XV5T2G
SOT-553-5
863-NL17SZ04XV5T2G
TI
UA78M05CDCYR
SOT-223-4
595-UA78M05CDCYR
1
TI
TL4050A25QDBZR
SOT-23-3
595-TL4050A25IDBZR
1
On Semi
NL27WZU04DFT2G
SOT-23 6 pin
SC−88 /
SOT−363 /
SC−70
863-NL27WZU04DFT2G
Fairchild
NC7WZU04P6X
SC-70-6
512-NC7WZU04P6X
2
1

RD-L026 - Fairchild Semiconductor